WTD: help debugging an eprom emulator

From: Philip Pemberton <philpem_at_dsl.pipex.com>
Date: Sun Aug 29 12:38:59 2004

Hi,
  Sorry for clogging up classiccmp with this message, but it is sort-of
classiccmp related (I wanted to build an EPROM emulator to make ROM
development on my BBC Micro a little faster).

  I've been trying to get my EPROM emulator design to work - I can't see any
errors in the wiring and AFAICT all the ICs are fine. I've uploaded the
schematic to <http://www.philpem.me.uk/epemsch.png>. If anyone spots a design
error, please let me know - I've gone over the schematic a few dozen times
and I'm almost at the point of giving up :-/
  It looks like data is getting loaded, but isn't getting output to the
target device properly... %DEITY knows why, though...

Thanks.
-- 
Phil.                              | Acorn Risc PC600 Mk3, SA202, 64MB, 6GB,
philpem_at_dsl.pipex.com              | ViewFinder, 10BaseT Ethernet, 2-slice,
http://www.philpem.dsl.pipex.com/  | 48xCD, ARCINv6c IDE, SCSI
... Psychoceramics: The study of crackpots.
Received on Sun Aug 29 2004 - 12:38:59 BST

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